>Ponder if you could possibly manipulate the radiation to send messages through Radio bandwidth, which should also include television and any other broadcasting medium. Might need a radio for feedback in order to know what it is that your modulations are resulting in when converted.
>Consider the possibility of using Nuclear transmutation on objects, for theoretically it should be possible to convert any lighter element to a heavier element through fusion, and as fusion is energy positive up till one reaches Iron, then therefore it should be possible to create material to work with by transmutation of the gasses in the air into matter like Silicon and Iron, or through the CNO cycle, transforming Nitrogen into Oxygen with a hydrogen atom.